Change-speed gearing



A BROADIVIEYER.

CHANGE SPEED (BEARING.

APPLICATION FILED Nov. 3. 1919.

1,404,739. Patented Jan; 31,1922.

3 SHEETS-SHEET l.

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A. BROADMEYER. CHANGE SPEED GVEARING. APPLICATION HLED NOV-3.1919.

Patented Jan. 31, 1922.

3 SHEETSSHEET 2.

A. BROADMEYER, CHANGE SPEED GEARING.

APPLICATION FILED NOV. 3, 1919.

1,404,739. Patented Jan. 31, 1922.

3 SHLETSSHEET 3.

l'wenfir: $656 rt fiifo w FATENT QFFTQEQ ALBERT BROADMEYER, OF HARRISBURG, PENNSYLVANIA, ASSIGNOB TO W. O. HICKOK MANUFACTURING COMPANY, OF HARRISBURG, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

CHANGE-SPEED sesame.

Application filed November 3, 1919.

To all whom. it may concern:

Be it known that I, ALBERT BROADMEYER. a citizen of the United States. residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Change- Speed Gearing, of which the following is a specification.

The present invention relates to change speed gearing, and the primary object is to provide simple mechanism of a novel and )raotical character whereby an. initial drivmg element having a constant speed will be caused to deliver any one of a wide range of speeds to a driven element.

The embodiment disclosed in the accompanying drawings is primarily utilized in connection with the driving mechanism of ruling machines, but is of course not limited to such use. In said drawings s Figure 1 is a plan view of the preferred embodiment of the structure.

Figure 2 is an end elevation of the same,

Figure 3 is a view of the opposite end showing the controlling means,

Figure 4 is a longitudinal sectional View.

Figure 5 is a detail sectional view on an enlarged scale through the first set of change speed gears.

Figure 6 is a detail sectional view on the line 6-6 of Figure 5,

Figure 7 is a sectional view on the line 77 of Figure 4.

Similar reference numerals designate (or- .responding parts in all the figures of the drawings.

In the structure disclosed a suitable sup porting frame is employed, including standards 8 and longitudinal side beams 9. On one of the side beams is located a journal box 10, in which is rotatably mounted the front end of a rock shaft 11 that extends transversely of the beams 9, and projects beyond the rear beam. Journaled on the rear portion of the rock shaft 11 is a tubular shaft 12 terminating short of the rear end of the shaft 11, and having fixed thereto gear wheel 13. The tubular shaft is held against longitudinal movement on the rock shaft 11 by a collar 14 at one end of said tubular shaft and by a crank arm 15 at the other end of said tubular shaft, said crank arm being fixed to the rock shaft 11. The

Specification of Letters-Patent.

Patented lan. 31, 1922.

Serial No, 335,458.

front end of said. rock shaft is provided with e an operating handle cranlr16.

Mounted on the tubular shaft 12 is a sleeve 17 that is capable of longitudinal movement on said shaft, the sleeve and shaft being held against relative rotary movement, however, by a feather or lrey 18 shown in Figure 4. The shafts 11 and 12 and sleeve 17 are sup ported in a journal box 19 suitably carried by the rear frame beam 9. In order to effect the longitudinal movement of the sleeve 17, said sleeve is provided at its inner end with a head 20 having a peripheral groove 21 therein, in which is engaged a yoke 22 carried by a longitudinally movable actuating rod 23. The rear end of the rod is slidably mounted in an outstanding ear 24 formed upon the box 19, and its front end is slidably mounted in an ear 25 outstanding from the box 10. The front end of said rod is provided with a suitable cross handle 26, and the position of said rod is fixed by a spring pressed bolt 27 carried by the ear 25 and adapted to engage in any one of three sockets or grooves 28 formed in the front portion of the rod.

Rotatably mounted on the sleeve 17 is a set of gear wheels 29 of different diameters. These gear wheels are held against lateral displacement between the outer end of the journal box 19 and one end of an arm 30 surrounding the outer portion of the sleeve 17., The other end of said arm is secured, as shown at 31, to a post 32 carried by the frame bar beyond the gears 29. It will be understood that these gears are independently rotatable, and are driven by gears 33 meshing therewith, the gears 33 being relativel fixed and actuated in turn from any suitable source of power (not shown). Each of the gears 29 is provided with a series of transverse feather-receiving slots 34, and the sleeve 17 has a set of correspondingly shaped outstanding ribs or feathers 35 adapted to pass through and slidably engage in said slots. As clearly shown in Figures 4 and 5, annular spaces 36 are provided between the ends of the bearing por- 100 tions of the gears 29, said spaces having a width at least equal to the length of the ribs. or feathers 35. As a consequence, it will be evident that by sliding the sleeve 17 any one of the gears may be locked thereto, 105

or all may be free therefrom. The locked engagement is maintained by means of the bolt 27 engaging in the different grooves 28 of the actuating rod, as will be obvious. It will also be noted that when any one of the gears 29 is locked to the sleeve, motion transmitted to that gear, will in turn be transmitted to the tubular shaft 12 since the sleeve 17 is keyed to the tubular shaft 12 as snown at 18, and as a further consequence the gear wheel 13 will be driven.

Extending in parallel relation to the tubular shaft 12 is a driven shaft 3? suitably journaled on the frame beams 9, and having fixed to its rear end a set of gears 38 of different diameters. The free end of the crank arm 15 carries a spindle 39 on which is mounted a double gear 41:0, one set of teeth 41 of which is in mesh with the gear wheel. 13, the other set 42 being adapted to .mesh with any of the gear wheels 38. To accomplish this engagement of the teeth 12 with the different gear wheels 38, it only necessary to turn'the rock shaft 11 by means of the handle cranlt16 and move the rock. shaft longitudinally. This movement, it will be observed, does not affect the coaction between the gear wheels 13 and ll, but only disengages the gear teeth 42 from the wheels 38 and permits the lateral change of position of the teeth 42 with respect to said gear wheels. Moreoverthe longitudinal sliding movement of the rock shaft, it willbe noted, effects a corresponding movement of the tribular shaft 12, but because of the feather connection 18 between said shaft and the sleeve 17, the driving engagement between the shaftand sleeve is in no manner affected. To determine the position of the intermediate gearwheel 40, an indicator in the form of a pointer 48* is mounted on the front end of the rock shaft 11 having a feather engagement 44 therewith. This pointer cooperates with a suitable index 45 mounted on the front beam. The pointer is thus caused to turn with the rock shaft and when it is in line with any of the indicating niiimerals on the index 45, the gear teeth 42 will be caused to mesh with the corresponding gear wheel 38 when the shaft is moved longitudinally. The pointer 13 is, however,

- held against longitudinal movement with the shaft, and to this end, it is provided nected by a contracting screw 51 having a suitable actuating handle 52. Bv this -means, a clamp is provided adjacent to the ;.actuating handle 16, so that the rock shaft can beheld against accidental turning and "longitudinal movement.

ltwill be clear that with the structure dis closed, a wide variation in rates of speed can be secured for the driven member 37 when the driving gears 33 are moved at a constant rate of speed. F or example, the tubular shaft 1:2 can be given three different rates of speed, accordingly as any three of the gears 29 are clutched thereto, and the shaft 12 in turn when driven at any of said rates Y of speed can be made to drive the shaft 3? at different rates of speed, depending upon the number and character of the gears 38 fixed to said shaft. Thus, in the present embodiment, eight gears 38 are disclosed, which with the three gears 29, will thus permit the shaft 37 to be driven at twenty-four different speeds. From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted towithout departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure'by Letters Patent, is

1. In change speed gearing, the combination with a longitudinally shiftable support, of a tubular shaft thereon, a plurality of gear elements, and coacting gears on tl e tubular shaft and support and shiftable with the latter to engage the different gear elements.

2. In change speed gearing, the combination with a longitudinally shiftable support, of a tubular shaft thereon and longitudinally shiftable therewith, a plurality of gear elenients, and coacting gears on the tubular shaft and support and shiftable with the same to engage the different gear elements.

' 3. in change speed gearing, the combination with a rock shaft capable of longitudinal movement, of a gear iournaled thereon, a

crank arm fixed to the shaft, a gear journaled on the arm and meshing with the first mentioned gear, and a plurality of gears of different diameters located alongside the rock shaft and adapted to be individually engaged by the second gear upon the rotation and longitudinal movement of the rock shaft.

1. In change speed gearing, the combination with a rock shaft capable of longitudinal movement, of a gear journaled thereon, a crank arm fixed to the shaft, a gear journaled on the arm and meshing with the first mentioned gear, a plurality of gears of difmounted to rotate with the shaft, an index with which the indicator cooperates. and means for holding the indicator against 1ongitudinal movement with the shaft.

5. In change-speed gearing, the combination a set of changespeed gearing including a driving member and a driven member, means for changing the gear relation of said gearing to operate the driven member at dif ferent speeds with respect to the speed of the driving member, a second set of change speed gearing including a driving member and a driven member, means for transmitting motion from the driven member of the first set to the driving member of the second set, and means associated with the gear relation chan ing means of the first set for changing t e gear relation of the second set to operate the driven member of the second set at different speeds with respect to the speed of the driving member of the secono set, said two gear relation changing means being independently operable.

6. In change speed gearing, the combination with two sets of change speed gears, of means for transmitting motion from one set to the other, and associated means for changing the gear relation of either set independently of the other set, including operating instrumentalities located one Within the other.

7. In change speed gearing, the combination with two sets of change speed gears, of means for transmitting motion from one set to the other, and associated means for changing the gear relation of either set independently of the other set, including operating instrumentalities located one within the other and disposed coaxially with portions of the motion transmitting means.

8. In change speed gearing,'the combination with a tubular shaft, of a plurality of gears on the tubular shaft, means for connecting any of the gears to the tubular shaft, another plurality of gears, and means for gearing any of the last mentioned gears to the shaft, including an operating device mounted in the tubular shaft.

9. In change speed gearing, the combination with a rock shaft, of a tubular shaft surrounding the same, a plurality of gears on the tubular shaft, means for connecting any of the gears to the tubular shaft, other gearing, and means actuated by the rock shaft for connecting the tubular shaft to said other gearing.

10. In change speed gearing, the combination with a rock shaft, of a tubular shaft surrounding the same, a plurality of gears on the tubular shaft, means connecting any of the gears to the tubular shaft, a second set of gears, and means actuated by the rock shaft for connecting the tubular shaft to any of said second set of gears.

11. In change speed gearing, the combination with a power transmitting shaft, of a plurality of gears surrounding the same, means shiftable longitudinally of the shaft for connecting the different gears to said shaft, another set of gears, and means shiftable longitudinally of the axis of the shaft for connecting the different gears of the latter set to said shaft.

12. In change speed gearing, the combination with a power transmitting shaft, of a plurality of gears surrounding the same, means shiftable longitudinally of the powertransmitting shaft for connecting the different gears to said shaft, another set of gears, said power-transmitting shaft being shiftable longitudinally, and means for connecting the different gears of the latter set to said shaft when said shaft is shifted longitudinally.

13. In change speed gearing, the combination with a power transmitting shaft, of a plurality of gears surrounding the same, means shiftable longitudinally of the shaft for connecting the different gears to saiiil shaft, another set of gears, said powertransmitting shaft being shiftable longitudinally, a rock shaft within the first mentioned shaft, and gearing supported on the rock shaft for connecting the different gears of the latter set to said power-transmitting shaft when said power-transmitting shaft is shifted longitudinally.

14. In change speed gearing, the combination with a longitudinally movable rock shaft having a crank arm at one end and an operating handle at the other end, of a tubu lar shaft journaled on the rock shaft, a sleeve feathered on the tubular shaft, a plurality of gears journaled on the sleeve, a feather for connecting any of the gears to the sleeve, means for longitudinally moving the sleeve, a gear fixed to the tubular shaft, a transmitting gear journaled on the crank arm and in mesh with the gear fixed to the tubular shaft, and a plurality of gears with any of which the transmittlng gear is adapted to mesh upon predetermined longitudinal and rotary movements of the rock shaft.

In testimony whereof, I aflix my signature in the presence of two witnesses.

ALBERT BROADMEYER.

Vvitnesses:

C. M. BUFFINGTON, Ross A. HIGKOK. 

